/Engine/Source/Developer/FunctionalTesting/Classes/FunctionalTestBase.h
Specify how log errors & warnings should be handled during tests. If values are not set then the project defaults will be used.
void SetLogErrorAndWarningHandling ( [TOptional](API\Runtime\Core\IO\TOptional)< bool > InSuppressErrors, [TOptional](API\Runtime\Core\IO\TOptional)< bool > InSuppressWarnings, [TOptional](API\Runtime\Core\IO\TOptional)< bool > InWarningsAreErrors )